Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly data

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total
Year Ended December 31, 2018
Revenues from services	$	5,522.4	$	5,656.9	$	5,418.7	$	5,393.2	$	21,991.2
Gross profit	885.4		922.7		890.6		880.3		3,579.0
Operating profit(a)	153.8		208.3		216.7		217.9		796.7
Net earnings	97.0		143.4		158.0		158.3		556.7
Net earnings per share — basic	$	1.46	$	2.18	$	2.45	$	2.56	$	8.62
Net earnings per share — diluted(b)	1.45		2.17		2.43		2.54		8.56
Dividends per share	—		1.01		—		1.01		2.02
Year Ended December 31, 2017
Revenues from services	$	4,757.2	$	5,174.8	$	5,464.8	$	5,637.5	$	21,034.3
Gross profit	787.8		861.7		900.6		934.5		3,484.6
Operating profit(c)(f)	127.9		195.2		228.7		237.4		789.2
Net earnings(d)	74.4		117.0		137.7		216.3		545.4
Net earnings per share — basic	$	1.10	$	1.74	$	2.06	$	3.26	$	8.13
Net earnings per share — diluted(e)	1.09		1.72		2.04		3.22		8.04
Dividends per share	—		0.93		—		0.93		1.86

(a) Included restructuring costs of $24.0 and $15.3 recorded in the first and second quarter, respectively.

(b) Included in the results are restructuring costs per diluted share of $(0.27) and $(0.18) for the first and second quarter, respectively.

(c) Included restructuring costs of $24.0 and $10.5 recorded in the first and second quarter, respectively.

(d) Included net tax benefits related to the Tax Act and French tax reform of $73.7 in the fourth quarter.

(e) Included in the results are restructuring costs per diluted share of $(0.30) and $(0.10) for the first and second quarter, respectively, and net tax benefits per diluted share of $1.10 for the fourth quarter.